Water and Recycled Water Master PlanCity of Tracy, California

June 6, 2011

West Yost has assisted the City in planning its water system for
over 20 years, including development of their original Water
Master Plan, creating and updating the City’s water system model,
and developing an integrated water supply plan. West Yost is
currently assisting the City in preparing a Citywide Water System
Master Plan which will encompass the City’s potable water and
recycled water systems.

West Yost’s work on the Citywide Water System Master
Plan encompasses the City’s potable water and recycled water
systems, and includes conducting hydraulic network analyses and
modeling. Key project elements addressed by West Yost include:

Developing an accurate estimate of existing potable and
non-potable demands and a realistic projection of future demands,
including the refinement of water duty factors for each of the
City’s customer classes.

Providing an integrated water supply plan that focuses on the
reliability of both existing surface water and groundwater
supplies and also provides an overview of potential potable water
offsets using recycled water, including an evaluation of water
quality issues.

Providing an operational, dynamic model that is capable of a
wide range of analyses and extended period simulations and can
confidently be used to evaluate and refine sizing and the layout
of the water and recycled water distribution systems.

Developing a capital improvement program that prioritizes and
phases projects, is defensible, and accounts for increased
conservation activities.

Existing groundwater, potential new wells, aquifer storage and
recovery (ASR) wells, out-of-basin storage, and recycled water to
offset potable demands and help meet non-potable demands, are all
being evaluated in the development of a Comprehensive and
Integrated Water Supply Plan for the City. Water quality will
also be a major consideration in the development of this plan,
from both a delivered water quality and wastewater effluent
discharge standpoint.